1. definition : the use of computer hardware and software to store , retrieve and manipulate information .
2. advantage :
2.1. speed
2.1.1. many computer can process billions or trillions of operations in a single seconh .
2.2. reliability
2.2.1. the electronic component in computers are dependable and realible because the rarely to break ,
2.3. consistency
2.3.1. a computer with same input will produce the same result consistently .
2.4. communication
2.4.1. computer can communicate wirelessly with other computer and allows user to communicate with one other .
2.5. storage
2.5.1. computers can store enormous amounts of data .
3. disadvantage
3.1. violation of privacy
3.1.1. other person might steal our personal and confidential records if they were not protected properly .
3.2. public safety
3.2.1. we might be a victim to crime if we are exposing or sharing our photos , videos or other personal information publicly .
3.3. impact of labour force
3.3.1. many employee might jobless if their skill have been replaced by computer .
3.4. health risk
3.4.1. prologed or improper computer use can lead to health injuries .
3.5. impact on environment
3.5.1. computer manufacturing process and computer waste can make pollution .
4. application of information technology
4.1. education
4.1.1. learning management system
4.1.2. computer based training
4.2. finance
4.2.1. finance investment system
4.2.2. online banking
4.3. government
4.3.1. E-filing
4.3.2. E-syariah
4.3.3. HRMIS
4.4. health care
4.4.1. medline
4.4.2. counter registration system
4.4.3. telemedicine
4.4.4. telesurgery
4.5. science
4.5.1. virtual reality
4.5.2. cochlear implant
4.5.3. hawk eye officiating system
4.5.4. neural network
4.6. publising
4.6.1. online newspaper & online magazine
4.7. travel
4.7.1. global positioning system ( GPS )
4.7.2. online reservation system
4.7.3. E-ticketing
4.8. manufacturing
4.8.1. computer-aided design
4.8.2. computer aided manufacturing
5. categories of computer
5.1. supercomputer
5.1.1. fastest and most powerful computer
5.2. mainframe
5.2.1. can handle hundreds or thousands of connected user in a single second .
5.3. personal computer
5.3.1. can perform all of its input , processing , ouput and storage activity by itself .
5.4. mobile computer
5.4.1. personal computer you can carry from place to place .
5.5. mobile devices
5.5.1. small enough to hold in your hand .
5.6. embedded computer
5.6.1. a component in a larger product